Activation of cobalt by neutrons from the Hiroshima bomb

Technical Report · Thu Feb 01 00:00:00 EST 1990

DOI:https://doi.org/10.2172/7243377· OSTI ID:7243377

Kerr, G D; Dyer, F F; Emery, J F; Pace, III, J V ^[1]; Brodzinski, R L ^[2]; Marcum, J ^[3]

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1. Oak Ridge National Lab., TN (USA)
2. Pacific Northwest Lab., Richland, WA (USA)
3. R and D Associates, Marina del Rey, CA (USA)

A study has been completed of cobalt activation in samples from two new locations in Hiroshima. The samples consisted of a piece of steel from a bridge located at a distance of about 1300 m from the hypocenter and pieces of both steel and concrete from a building located at approximately 700 m. The concrete was analyzed to obtain information needed to calculate the cobalt activation in the two steel samples. Close agreement was found between calculated and measured values for cobalt activation of the steel sample from the building at 700 m. It was found, however, that the measured values for the bridge sample at 1300 m were approximately twice the calculated values. Thus, the new results confirm the existence of a systematic error in the transport calculations for neutrons from the Hiroshima bomb. 52 refs., 32 figs., 16 tabs.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOD
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 7243377
• Report Number(s): ORNL-6590; ON: DE90008018; TRN: 90-008445
• Country of Publication: United States
• Language: English

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